Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea6cb966a17b60561bacb8313b3cc5562a64fb98c3ff5e7bea74eb0a64a8c76c' 
  AND token = 'Q9yEVlC3K/IZScLAI3eCo3XqI4z0XyA+rNwy8jKtE7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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