Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e92a53f6ff61bf317a34264273909cd24d0b0652c078475e645cd9760699d71' 
  AND token = 'l0ngTcw/5ok6nHas8WAI8oWGRp1lO46HTDDseTvGB7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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