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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65f1857e037f9e1bcd7225845d741d127d257bd050342d18f2c89ba5bc6e0209' 
  AND token = 'GGRgRrHpGjG/78Y0vtWtWX0wQSWQeTCrInsBYnP8Iyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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