Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '235ead6323d1f47a236561db44f54afab1413767de5c2c6b174ba82e7a385da0' 
  AND token = 'mzdi8b7jJcwwZq16At8If9+ye7vOwF9OcQxloRWjEss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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