Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8042a430347da4b2c31b183e3c9710cee572ab2b7be4755ffddf9f17f0e220df' 
  AND token = '/cjNd+I/f5675XGD3FS4DMp/p0tF0HTcvdwfsjMEvJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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