Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8089f86af9fb237c3ce2892d4cfee136ba710e10860bdd55137ff37a987533f' 
  AND token = 'wygCqT0zOuqSD8kYSafB9CsP6fsY5felMGhWPu+ssDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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