Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23c2575916deb377b97fbe7f95bc9853d488ffcf76917ec68ca2cf8c6feeca1a' 
  AND token = '85vcjF3GSWSMpwZ0SVw32xTqTsE3fLDJak1G3aqD07M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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