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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb32c2d6d6264b58f1bbff1a18d6ebd01a8b8757ed5f4696dd0eda52d62154c6' 
  AND token = 'Wioa1H4qxNkmATqYipT/6QmhIjRLl89L6RX3PQ/J6Sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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