Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a1940afbfafc5731c09de9add52184ff5b7659d49d69c549e8af4eabb587b5c' 
  AND token = 'g4yShhTw/OTWD8k+27WF/3Yrm9dAV07RLAxgzj2Vpjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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