Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '162f48317582d85c6869fd0070f114587566ef72a4687cc5852deefb2f47fcd7' 
  AND token = 'Ps8wF2xN/Dubz3riPe4k+lUP+COVGqSO7i5opMkfsKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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