Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63a09d1e607fcf53543c62a186ed78ae16a2207a0f03b7c8cfd2df25c5455b58' 
  AND token = '9T3zoZzWwf1g6t7njZp4n59APUVBZHQ0njvthOtFik4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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