Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd04338b79feb2bdf0e91624ec877918f9e869618a3ba4184a073fcece40a9d' 
  AND token = '36NwuVHJr9c6p5u2S7/fXUw63a+Nx6iwjzOW2uSg49U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}