Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcafec966983a2f59cc3493a3613fe002df2aa0d0df6fe57bee3db78a8ad44ce' 
  AND token = 'ulLcyaA6rKF4NZAsfg2yyqXrrerLbNOfQnleIrUpeKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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