Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4317193251276ba9ac35533b83ab3e87a95687f31c48cddabdd86baff45a8f30' 
  AND token = '6T0uyXy0Qyyajs/125krR/7c3FNGarRJysgcodoZWwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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