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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61fb4627844c9c327a0ee8b6b2369d486692bb2edf96564caf3b785b39efc5de' 
  AND token = 'U/5rp8Ah2HlYiNOSM3/FMkh2Uw9Xzx/U9COsXrci6Ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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