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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab466be5431737b91fc12133c342914d22a121bd9ec9e85223421356292d15db' 
  AND token = 'WEnY1WYu5I5wnHfoA95a2t8jcmq1XWaE1v8pRV++vlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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