Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cd07fd086c122b87b7276d49e318e57afb5f0a88704d9ad8c1ae4c53b82bdf0' 
  AND token = 'YDS41Wp2TpDKPZGACVbH19FClTZdi3Fi9saseK6f5E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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