Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8758537b58185f4ae00e350a900feef90e9667d1cb50174f2d6623c8bd95a533' 
  AND token = 'TFe0mmARdQWYRGesMkOklNHQMBqsUAn++JnYd4M3yO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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