SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af9ea229a7fee22541b98fd457784f296d95e783bb7e9e660ec64954946fce09' 
  AND token = 'kJPy1zhlA/wqQZhX1nrCES2rObUNFGl3Jk3H5zBV9KE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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