Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd466e6e9d1073d0b8f092343166f70fb1bef2fa1c72b996087319febcedd065a' 
  AND token = 'CmbWa+YUM2Of5bd3YDUZw8EpSsyF2cZIsV2QkIjxxe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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