Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4bdf143e980bae342756afaa2ca38f177ccfa49a882bde2baf5775314047927' 
  AND token = 'Zq2SEBNJg/14w5zlPeT5k2BD0rgOE5kJczIu3FpWCT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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