Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '291c6889e955f89451437f31477574962729e3b30605d1dee86eb869710d2c2f' 
  AND token = 'GFqIoMxeeB/J8yFs7llBN1X3jS6FaRfZtNFNSWuwp+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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