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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23a20d3e466005011af19015d2e02b6ec3e6bcf1d22452628c3d61ac791bb2f7' 
  AND token = '5Axtelm/ODcsF/Mt7g0ZDuHnFlVDeFGibmoQ+RmkX9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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