Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'aaab6b1d58985da20a08cddd350b82b95c3a9d9ba51dae4c4c38944d9afb3d1b' 
  AND token = '8a1/1K76iYub4NdEoa/1XN8JC7QablmCtxouu3Dv6NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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