Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f2613080be2c5ca43167e335e0011b5c2786b3c6d5e299d668e25e7775bcca0' 
  AND token = '4nHQqMSui1dMl4ix50KsLeO3Yc25zrg7g1ot518PlH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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