Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '445bfb3ade0ab41f8f5873dd844802b44ebc1559ca507e9e52c84d8e660836b1' 
  AND token = 'qQaIngyOm3JNDRG1+Ev6S2WFnXxdpKgv6Gz4ld4zVDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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