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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89c297fcd2ad9307a354acab8631175ead3cb0cba48e3415ab4537930646d775' 
  AND token = 'Z6tZ05tQ/p0/+9npaDUNHUN83aRqJ5XYi5Cq1FIzyfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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