Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88a86f60955dacb96fbef9bc357d42796b0c80c7a1522fd073beda081d321aa8' 
  AND token = '7jt/HELuktpx9IKHzdl8AODYfakJGI8puX0Pv44oISg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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