Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '860acdc3f331fbd27b2ba080279904ed1d8f205753b64ab5e51846304d4e1cf0' 
  AND token = 'JnmxShxT3/8YEwxnpT8nw8cE93zpaUFMt0lmJVagLvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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