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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c919a7e4101f06420d236d0271208a0a3075c5b726639009ea9b8fcef4e50770' 
  AND token = 'qvrmvzsFpiCMl9If2TcM2n7rLmEV2eeFTeaN2NVIqEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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