Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ab5e8e88828cbbfc210b60c4201b83943ae0db90de01261927a9ab2475a8a4b' 
  AND token = '4IGGNuqGUPVf3jGxOFsEH6YWzTB2+rSZ7keeYCgVjL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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