Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a24ad7e44bfa8cd9850a17bd5a06ee76d8c21740ffc6a3a4d384b2daefba9813' 
  AND token = '/c/AUCiOEW112s6z3GXdmfW6OrRhXEYz7A1k4wsTm5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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