Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af8784d8414f461109003a893d5d9059fc1726531f107867a81e2ac4ef62ddf8' 
  AND token = 'X6QHxffzoH8qRvIB8J7wSHl42THAgXsoF0z/x0+vIOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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