Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f787ad7ad2d4759bc4db69cc628b5e2f94890f5375128f0bc663335862fe07c1' 
  AND token = 'kxg9g0TC2MkXcduTK8vCYBxpb7Ch3MDeXE5nVEvQzg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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