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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90dbc66e803bc232b2a9072bbd665b92c1a3c96bbdb4c9941846524195bb0948' 
  AND token = 'KnML4KkbMT2MpeY9YalbvpNPnNjEMQWsCQ7yzSfiQn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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