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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67a05b52e4914dce373eb36fe7cbc0b3ea5fa447ffa8bf76e5d703559a13d763' 
  AND token = '0ro5YP2YOmxx5U/za5k00cVxMNTgSCk9lebw1kLOezY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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