Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8414bc57332b913d6f3d52ca6bf1b1b62dfd7cfcb318f5fe040549d6ce9d7213' 
  AND token = 'yVZ+ucT99MgL1owk4n6X85NdTmgTDI1nuoSvjgxnIdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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