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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc4d3843c5c26a0d2ea14184c2f7737f4ace4967b2f62128081664dc6a62b077' 
  AND token = '8sYyfIXVm09YfYV84TastxqkRCA1I4sxruscyATp2nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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