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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04c180f26c84605b5d8d954124fc64df7ab437c5c0bff3dd9cd25bab4c379723' 
  AND token = 'xRLf82nRskCOVWcxpWBD6X4O3sdpY0Na9iFHN0QXGeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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