Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898bcab81e2cce8271e1c76e5965bff3160aa065a97e6b3215ad3926cc037802' 
  AND token = 'iNeDLVMIqnyYrxzdtowTtaaovzuI2w9a30lwn7Pv3V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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