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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96adcb5cc54cf32ee6da3f98887ad889b5c3f510a7524f8bebff4a32d11c1091' 
  AND token = 'u+748Bl99Dw5uRLf0A/HntOR8EPj6cJmso62mZtxHyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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