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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d6f05d883d6885918a0c69bba0aee3457bbb48af228c8d24bb505830f4f30cb' 
  AND token = 'J9ai25PayaAvFOzdheuSdGiciT9i99Kp+lFXkBBao4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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