Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7101399c402eac4597c19785e00410533bdb1a9c915cde5aab57757ba45a3279' 
  AND token = 'phnuJ060XN8Z1SkvQOQxfqYex/UJkW2qzvy4o8VCc0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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