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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dd461cd4a035b878241f6159c79389da8ddf547ba80c9e94461a7cbb08d965b' 
  AND token = 'CxeEKWIeQW4a0n3Tw/8B6qZq8TBflDkZP8rHnYQ2xWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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