Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1620ba40e907bfd252b228a0113b50ce7a042d60a945e6f4dcb45ce87e6192ff' 
  AND token = 'kuUvjkfxujPBWcsuqtBIl/2D1Jqp4QM9GGvKmIsalSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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