Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8aaf81bfd3dee7f2d50b1f81a03627a55f15266741455af40a811f452650bff' 
  AND token = '9VbtH35sqk4niQNCXvw3CaEyVm4Tf6fvb+sTa5IKfcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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