Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d2df705c02115907a2c86d1d7feb404c341d601f2c64fb2242c0841ecc98963' 
  AND token = 'lzGHmZMLbdICkiWg92SMk2niYCKeA2/gzeUVQ+P1k2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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