Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b096b6fb1948ad8ed8ebabca004cb09a374c859ebae61a0257af1303ed129493' 
  AND token = 'wr6vE6JitRbSed+svNbEAVM79xUeck7FSMQgTyZmtf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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