Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bf5aef38e46eaffd8d638dc9d607a480056aa70623fbb4487ab019a6f81afd4' 
  AND token = 'Z9a90tFu+MhIrlEuyIutVxTbw85CVXZeX87QvbrGRj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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