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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06572dc4c1c2c3fae9248ab91b1f6718288573f9a7076e0c48a59a9d5c429e0f' 
  AND token = 'BY7bWA6sVm/+ecSg0XLEZHCDFBMrX04ww747UuEcIwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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