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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8567a3b53af6920dc2a732a1d4d5bc1bab91d599a21b1eeea1cc8c94598cfc3' 
  AND token = 'W32MH7Ebu2VxhVBByroLZh3wYqpBOrsNLkrm5DefTvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}