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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff7f36fbc16d2d86cf87db0632464221b3febbfe1c2e03214967de5a2734d584' 
  AND token = 'V3E3gsXKSbk7Ye2K7CzEP45Q3qJDdiV2f+f42nx6BnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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