Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c367657893649cb7ea74577e2360e84851823f906a8cbd6e55ff4baa449266e' 
  AND token = 'qN6atBFPJByB3iEM+8QOu074hKUKlYQJzefTSenaB4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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