Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '450d4d025f284ff2cd3e7630ccbbad2aea3478985deae80a456b84ee597c66dd' 
  AND token = 'fH8HRp3xOpyGXP8ZTY2ebXZuPnm+7LFC2C2cxCKnprc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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