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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc02f3515d9e2829534e9d612afad87e1fc9c149a76272a33e73f4bf6be978bf' 
  AND token = 'ssRSEy1ZP0RtzWU+XOUMIwETIQDnecyHFiM+bO/iUo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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