Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da15441312e0b874ef39828c245d974734673fa214f657b3bdddec9bbec31156' 
  AND token = 'gwRBWSZ6vCPqdCyqvbpHgQS42v13LDH7W73m95nO0OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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