SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f28e421b568079710d012544d5c9dd7a20b8df0fe3172bfcd73c7772d0c62c0' 
  AND token = '1p4bN8QIyBFK9iukJ+q7iVYDoF2ZCNuhmF0KPE4ZoIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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