Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22d853ed92e9ea0f1aab77313c30e1eb4d171a0dddfdc7349178766d39d728e4' 
  AND token = 'l6Qo+oPug9Advg7zGVKJ+ngqtJvHR8InsuELdsIuQKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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