Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb7aad5ad0fffaacd0b65b3e0c97d86d7079615fbfc2cc4de4efeac0d78f6e36' 
  AND token = '++GFz37/dmCm7NESa6KqaD/fFQbDFzF4lEEkwo86PCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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