Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '108714ece1ac6b8b76adda704ed58f31fac6bf5667c096a0cfef3e85f99d7050' 
  AND token = 'Dk7Yrg3TinSl12oGPxZ5Jx0J0fbXdIRrcEHPbY/9B7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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