Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2971d917a22f3ec1c3b3d08ddfc6042a4ea8180e0445fe07c880a30a6ecaf1f0' 
  AND token = 'gfqLdqF1IL6OJpzCgYebA71gOvXTkBEDYKdChlAAxuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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