Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f0717e41e3cf483ce06137a798774ccccba07adf2828ed95f1a1868611a3f84' 
  AND token = 'Snbln0bxLPnplft0n85kjM2BpwR/vQJ2XXDzWfj2PAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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