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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2435b3f1d0483d97810c30b15695baf8aea68d5683609cbe57f3b1f309a1b9f' 
  AND token = 'BGTTIbKfqJlIOPKw1t1J/MU2GkhfCiGs0JWYGhKysa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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