Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2714ba8229e60ea004f80b8425a9deffa6f1c4155791a526a804ab08edc4e1cf' 
  AND token = '8AjOLA3nCVJyGqntczzMmFIw6lGxa+GEScIClg3mets=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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