Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38fb92a0655610a27d273481b13a4cf4d2af4b93f397a7b3e6157ba8264ae5fe' 
  AND token = 'iFkw6hwm/C4oOonKtHClTV2OUyu2ktRem8zRCoxiwH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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