Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '78e9c05b2335d7d41e6ea3f8dc9db88fb5de50d42fd67d3f62991a8ad9475068' 
  AND token = '7wNYPCcTe4CA+L1+fBei58LQYUJ8mmWQJnulpOF4lfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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