Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '42ece55086a2ccc9030f40a15979df12972dc016655ff81d098b724b358e9b5d' 
  AND token = 'YDsFTDqBUaT/v8e+vLOLUmMTwaLRmqpqSmcEskH2sWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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